Materials Data on Zn2Co3O8 by Materials Project

Abstract

Co3Zn2O8 is Pyrite-derived structured and crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Co4+ sites. In the first Co4+ site, Co4+ is bonded to six O2- atoms to form edge-sharing CoO6 octahedra. There is four shorter (1.87 Å) and two longer (1.92 Å) Co–O bond length. In the second Co4+ site, Co4+ is bonded to six O2- atoms to form edge-sharing CoO6 octahedra. There are a spread of Co–O bond distances ranging from 1.83–1.92 Å. Zn2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Zn–O bond distances ranging from 2.04–2.24 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Co4+ and one Zn2+ atom. In the second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Co4+ and one Zn2+ atom. In the third O2- site, O2- is bonded to two Co4+ and two equivalent Zn2+ atoms to form a mixture of distorted edge and corner-sharing OZn2Co2 tetrahedra.